公开(公告)号：DE4006371A1

公开(公告)日：1991-09-05

申请号：DE4006371

申请日：1990-03-01

Applicant: HOECHST AG

Inventor： BRUECK MARTIN DIPL ING ,  VAAHS TILO DR ,  KLEINER HANSS-JERG DR ,  PEUCKERT MARCELLUS DR

IPC: B29C70/06 ,  B29K105/06 ,  C08G77/48 ,  C08G77/62 ,  C08J5/24

公开(公告)号：DE3905271A1

公开(公告)日：1990-08-23

申请号：DE3905271

申请日：1989-02-21

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BOBERSKI CORNELIA DR

IPC: C04B35/58 ,  C04B35/584 ,  C04B35/593

Abstract: A high temperature-resistant, multi-phase ceramic with a content of 25 - 85% by weight of crystalline beta -silicon nitride, 11 to 70% by weight of crystalline, cubic HfO2 and an amorphous glass phase which, in addition to silicon, contains at least one of the elements magnesium, yttrium and/or of the rare earths and, if appropriate, aluminium, has good mechanical properties. … To produce this, a mixture of 25 - 85% by weight of pulverulent alpha -silicon nitride, 11 to 70% by weight of monoclinic HfO2 and 5 - 20% by weight of at least one oxide of the elements magnesium, yttrium and/or of the rare earths (from Sm-Yb) are moulded to form a body, and the latter is dense-sintered at 1700 - 2000 DEG C.

公开(公告)号：DE3904118A1

公开(公告)日：1990-08-16

申请号：DE3904118

申请日：1989-02-11

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BRUECK MARTIN DIPL ING ,  VAAHS TILO DR ,  KLEINER HANSS-JERG DR ,  ALDINGER FRITZ DR

IPC: C04B35/584 ,  C04B35/58 ,  C04B35/589 ,  C04B41/45 ,  C04B41/81 ,  C04B41/84 ,  C04B41/87 ,  C08G77/62

公开(公告)号：DE3737921A1

公开(公告)日：1989-05-18

申请号：DE3737921

申请日：1987-11-07

Applicant: HOECHST AG

Inventor： VAAHS TILO DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  ALDINGER FRITZ DR

IPC: C04B35/58 ,  C04B35/589 ,  C08G77/62

Abstract: The polysilazanes are prepared by reacting dialkylaminoorganyldichlorosilanes of the formula RSiCl2-NR'R' with ammonia and can then be pyrolysed to give a ceramic material containing silicon nitride. The polysilazanes according to the invention are soluble in conventional aprotic solvents.

公开(公告)号：DE58909424D1

公开(公告)日：1995-10-12

申请号：DE58909424

申请日：1989-11-29

Applicant: HOECHST AG

Inventor： VAAHS TILO DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN

IPC: C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

Abstract: The polymeric chlorosilazanes are prepared by reacting a mixture of oligosilazanes of the formula (I) … … in which n is from about 2 to about 12, and oligosilazanes of the formula (II) (RSiHNH)m in which m is from about 3 to about 12, with at least one of the chlorosilanes Cl2R Si-CH2-CH2-SiR Cl2, Cl3Si-CH2-CH2-SiR Cl2, R SiCl3 or R SiHCl2 at from 30 DEG C to 300 DEG C, where R and R to R are C1-C6-alkyl or C2-C6-alkenyl groups, which may be identical or different. … The polymeric chlorosilazanes according to the invention can be reacted with ammonia to give polysilazanes, which can themselves be pyrolysed to give silicon nitride-containing ceramic materials.

公开(公告)号：DE58907840D1

公开(公告)日：1994-07-14

申请号：DE58907840

申请日：1989-11-29

Applicant: HOECHST AG

Inventor： VAAHS TILO DR ,  GERDAU THOMAS DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN

IPC: C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

公开(公告)号：DE3887628D1

公开(公告)日：1994-03-17

申请号：DE3887628

申请日：1988-10-04

Applicant: HOECHST AG

Inventor： GERDAU THOMAS DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  ALDINGER FRITZ DR

IPC: C04B35/00 ,  C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62

Abstract: The polymeric hydridosilazanes are prepared by reacting polymeric hydridochlorosilazanes with NH3. Pyrolysis of the polymeric hydridosilazanes gives a ceramic material containing silicon nitride.

公开(公告)号：DE3886695D1

公开(公告)日：1994-02-10

申请号：DE3886695

申请日：1988-11-04

Applicant: HOECHST AG

Inventor： VAAHS TILO DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  ALDINGER FRITZ DR

IPC: C04B35/58 ,  C04B35/589 ,  C08G77/62

Abstract: The polysilazanes are prepared by reacting dialkylaminoorganyldichlorosilanes of the formula RSiCl2-NR'R' with ammonia and can then be pyrolysed to give a ceramic material containing silicon nitride. The polysilazanes according to the invention are soluble in conventional aprotic solvents.

公开(公告)号：DE59003493D1

公开(公告)日：1993-12-23

申请号：DE59003493

申请日：1990-02-19

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BOBERSKI CORNELIA DR

IPC: C04B35/58 ,  C04B35/584 ,  C04B35/593

Abstract: A high temperature-resistant, multi-phase ceramic with a content of 25 - 85% by weight of crystalline beta -silicon nitride, 11 to 70% by weight of crystalline, cubic HfO2 and an amorphous glass phase which, in addition to silicon, contains at least one of the elements magnesium, yttrium and/or of the rare earths and, if appropriate, aluminium, has good mechanical properties. … To produce this, a mixture of 25 - 85% by weight of pulverulent alpha -silicon nitride, 11 to 70% by weight of monoclinic HfO2 and 5 - 20% by weight of at least one oxide of the elements magnesium, yttrium and/or of the rare earths (from Sm-Yb) are moulded to form a body, and the latter is dense-sintered at 1700 - 2000 DEG C.

公开(公告)号：DE3883723D1

公开(公告)日：1993-10-07

申请号：DE3883723

申请日：1988-11-25

Applicant: HOECHST AG

Inventor： VAAHS TILO DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN

IPC: C01B21/068 ,  C04B35/00 ,  C04B35/589 ,  C04B41/87 ,  C08G77/48 ,  C08G77/60 ,  C08G77/62 ,  D01F9/10

Abstract: The polysilazanes are prepared by reacting Si, Si'-diorganyl-N-alkyltetrachlorodisilazanes of the formula RSiCl2-NR'-SiCl2R with ammonia and can then be pyrolysed to give a silicon nitride-containing ceramic material. The polysilazanes are soluble in conventional aprotic solvents.